I had an Asus RT-AC68U for years and the process for updating firmware was easy. Check on update tab in admin panel and it just did it. I just replaced it with a RT-AC86U because its bettter/faster ...
I have a Comcast 170mbps plan for 8 months now and it's always worked great. I have an Asus N66U router with Merlin firmware. My gaming PC is connected via ethernet cable and routinely speedtests at ...